Thank you for replying. I just want to say in response to your comments that what seems obvious to me here is how much your children need to learn to be more mature, empathetic, assertive and to have fun while doing healthier activities. Only wanting to spend all their time watching TV and playing games while not having any responsibility at home is no a healthy approach to raise children at all. Children do not spontaneously learn to be assertive and responsible, but they use all their intellectual intelligence, social skills and means to manipulate and make things work the way they want. Thus is a parent does not set and keep healthy boundaries and limits, rules and discipline, making it clear what is healthy and acceptable and what is not, children would waste all of their free time watching TV, playing video games, playing int he internet, with their smart phone, etc.They would not learn to be assertive and mature with their friends or strangers, thus if you do not work on teaching them how to respect themselves and be empathetic and responsible, they would not develop these necessary skills and maturity.
To allow a child this age -12-14 to do whatever they want is not a healthy nor responsible approach at all, rather you need to dialogue with them, and be clear about which are their responsibilities at home, towards you, their little sibling, around house chores, and to find a balance between acceptable time watching TV and playing games, and doing any healthy activity by themselves and all together as a family. They used to enjoy many of these activities you said, but now that they are changing, they are and will continue pushing you to see how much more freedom and power they get, and if you do not know how to find the right balance between giving them time and space to be themselves, while also being fully responsible with their personal duties-tasks, those towards you and at home, they will have a hard time to build a healthy life as adults and to cope with life issues and responsibilities.
The easiest approach is to please their ego and let them do whatever they want, for sure they would "love " you and tell you how great you are, but those would be their egos pleased because of being spoiled, while your children's well-being and development would be deeply undermined and distorted. the healthy ways would trigger negative reactions, resistance and conflict, but these would be necessary and constructive conflicts as long as you commit to be consistent providing healthy and balanced discipline, affection, responsibilities and incentives.
You are playing both parental roles moment by moment in your children's lives, that's why both aspects of discipline-rules-responsibility on one hand, and affection, understanding and flexibility need to be present and balanced with real skill. this is not easy but tough at this time in their lives. Please consider taking parenting classes or getting family counseling for all of you to work with professional support on developing this open and healthy dialogue, to clarify doubts, and to develop a concrete plan where responsibility and fun, freedom and family sharing support each other, where you as the parent, guide and control this process while keeping an open dialogue with your children.
Thus they would have a specific period of time to watch TV for example, but only a long as they have already complied with academic tasks, home chores and any other responsibility. Then you would plan ans schedule other "healthy" activities, where you would be and share together. You would give them different options for them to choose with you. if they refuse to participate in this decision process, they that'd be their choice, and you would do your job and stick to them, thus you would teach them that they are accountable for their choices and actions, the same way you are, and if they do not want to work on defining what to do during afternoons, weekends, a vacation time, etc, then you would be the one to set those plans and they would have to participate either way.
Does it make sense?